Fiber Transmitter Modules for Fairbanks Command and Data Acquisition Station

The purpose of this Amendment 0002 is to post additional Government responses to vendor inquiries: 1. Vendor

Questions & Answers: Question 3: Is the fiber standard SMF-28 which is dispersion shifted for 1310 nm? Government Response: Specific fiber sub-model details (such as SMF-28 characteristics) are not available. The station operates across both 1310 nm and 1550 nm. Question 4: Have they measured the fiber path at 1550 nm? Government Response: Yes. The fiber path was physically measured on-site to determine the optical loss values. Question 5: The SITU-3013 requires +/- 5 VDC and +/- 15 VDC. Does the site power setup support these voltage levels? Government Response: Yes. The site's existing power supply provides +15 VDC, -15 VDC, +5 VDC, and -5 VDC. Question 6: Is the SIRU-3013 Receiver Module required? Government Response: No. The SIRU-3013 Receiver Module is not required. The Government is strictly acquiring the SITU-3013 Transmitter Module. ALL OTHER TERMS, CONDITIONS, AND THE OFFER DUE DATE OF AUGUST 03, 2026 AT 3:00 PM EDT REMAIN UNCHANGED. (END OF AMENDMENT

0002) AMENDMENT 0001 (July 21,

2026) The purpose of this Amendment 0001 is to post Government responses to vendor inquiries and clarify site-specific RF technical parameters: 1. Vendor

Questions & Answers: Question 1: What is the required fiber optic cable length? Government Response: The required fiber optic length is less than 2 km (approx. 2 km). Question 2: What is the expected optical fiber loss (attenuation)? Government Response: Expected fiber loss at 1310 nm is approximately 0.5 dB; expected fiber loss at 1550 nm is approximately 0.35 dB. 2. Site RF Technical Parameters: Operating Frequency Range: 7700 MHz – 8500 MHz Patch Panel Configuration: 4 patch panels utilizing FC/APC optical connectors RF Connectors: SMA connectors Power

Requirements: AC Input 90 VAC / 240 VAC; DC Input +15 VDC Operating Environment: Temperature -25°C to +65°C; Humidity ≤ 90% non-condensing ALL OTHER TERMS, CONDITIONS, AND THE OFFER DUE DATE OF AUGUST 03, 2026 AT 3:00 PM EDT REMAIN UNCHANGED. (END OF AMENDMENT